I can answer you. so from what I know, the precursor, i.e. 2b34m, must be clean, then 1 by 2 there must be a very good bath after amination in water and baking soda, water alone does not cleanse the product of methylamine after souring, there cannot be excess acid and the freebase solution cannot be heated, it must be kept in an ice-cold bath all the time. after 4, hcl powder must be pure white, if it has a different color - yellow or brown - there are impurities. If we already have pure fine methylone hcl powder, then we can crystallize it